Publication detail
Large Eddy Simulation: subgrid-scale models
VOLAVÝ, J. FORMAN, M. JÍCHA, M.
Czech title
Large Eddy Simulation: subgrid-scale models
English title
Large Eddy Simulation: subgrid-scale models
Type
journal article - other
Language
en
Original abstract
Subgrid modelling in Large Eddy Simulation is proposed and analysed. The main idea of Large Eddy Simulation is to separate the eddies containing large energy from small dissipative eddies (scales). The large eddies are solved explicitly, the small ones are modelled. For modelling of these smallest scales so called subgrid-scale models are used. The paper contains a short description of the most used subgrid-scale models, particularly Smagorinsky model, dynamic Smagorinsky model, subgrid kinetic energy model, dynamic subgrid kinetic energy model and mixed model. These models are consequently tested on the case of a turbulent channel flow. The calculations are performed using an open-source code OpenFOAM. The results are compared with the DNS data.
Czech abstract
Práce je zaměřena na modelování subgridní oblasti pro metodu Large Eddy Simulation. Hlavní myšlenka této metody spočívá v separaci energii obsahujících vírů od malých disipativních vírů. Velké víry jsou řešeny expilicitně, zatímco malé jsou modelovány. Pro modelování účinků malých víru se používaji tzv. subgridní modely. Článek obsahuje stručný popis nejpouživanějších modelů a tyto modely jsou následovně použity pro simulaci proudění tekutiny kanálem. Výpočty probíhají v programu OpenFOAM.
English abstract
Subgrid modelling in Large Eddy Simulation is proposed and analysed. The main idea of Large Eddy Simulation is to separate the eddies containing large energy from small dissipative eddies (scales). The large eddies are solved explicitly, the small ones are modelled. For modelling of these smallest scales so called subgrid-scale models are used. The paper contains a short description of the most used subgrid-scale models, particularly Smagorinsky model, dynamic Smagorinsky model, subgrid kinetic energy model, dynamic subgrid kinetic energy model and mixed model. These models are consequently tested on the case of a turbulent channel flow. The calculations are performed using an open-source code OpenFOAM. The results are compared with the DNS data.
Keywords in Czech
Large Eddy Simulation, subgridní modely, proudění kanálem
Keywords in English
Large Eddy Simulation, subgrid-scale models, channel flow
RIV year
2011
Released
01.11.2011
Publisher
Institute of Thermomechanics AS CR
Location
Praha
ISSN
0001-7043
Volume
2011
Number
3
Pages from–to
271–280
Pages count
10
BIBTEX
@article{BUT75172,
author="Jaroslav {Volavý} and Matěj {Forman} and Miroslav {Jícha},
title="Large Eddy Simulation: subgrid-scale models",
year="2011",
volume="2011",
number="3",
month="November",
pages="271--280",
publisher="Institute of Thermomechanics AS CR",
address="Praha",
issn="0001-7043"
}